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8
votes
3answers
5k views

What is "crank preload"

I'm in the middle of swapping my BB30 cranks from stock FSA Gossamer to a (shorter length) SRAM BB30 "IA" S950. The S950 has a "crank preload" adjuster on the NDS which the spindle is also attached ...
3
votes
0answers
74 views

Through axle came apart, can't put it back together

When pulling the axle out after disengaging the quick connect, the shaft won't push through and the other side all the little metal pieces fell out. Tire won't come out and cannot put it back together....
2
votes
1answer
59 views

Spacing when removing 2nd cog (12t) from Shimano 10 speed cassette

I'm converting a 10 speed Shimano 105, 11-25 cassette from 11-12-13-14-15-17-19-21-23-25 to 11-13-15-16-17-18-19-21-23-25. This gives me kind of a "corn cob" in the middle, with bailouts on ...
3
votes
2answers
72 views

Converting Threaded BB Shell To Press Fit Shell

I have a bike with worned thread on the BB bracket shell. I talked to a mechanic, and he said that is difficult to repair the shell. The main problem is that he and most bike mechanic here has no tap ...
2
votes
3answers
977 views

Are aluminum anti-seize and silver anti-seize different?

I asked someone to pick up some silver anti-seize (which I'd seen recommended) and they came back with aluminum anti-seize. Is there a difference? I could imagine that, when used between aluminum ...
3
votes
2answers
162 views

Speedplay pedal grease problem

I’m trying to grease my Speedplay pedals, but the little end screw on one of the pedals just spins. It will not unscrew, thereby denying me access to the grease port. Any thoughts?
1
vote
0answers
34 views

SRAM Rival eTap AXS in «semi-automatic» mode

I am an almost complete noob in electronic shifting, so pardon my possibly stupid question. I've read somewhere that sram rival etap has a «semi-automatic» shifting mode, which keeps jumps to next up/...
10
votes
3answers
638 views

Seat post bolt sheared off - twice

I use a BMC TM02 on CycleOps Magnus. The seat bolt has sheared off twice while riding on the trainer. The seat is attached to the post by a single stainless steel bolt. KSFC 12.9 appears on the head ...
2
votes
0answers
37 views

Uneven wear on tire rim (V-brake set up)

I've noticed that the wear on my tire rim is uneven. The black indicator groove is still visible in some places, but worn down in other places. Both the left and right side braking surfaces have this ...
7
votes
5answers
13k views

Dealing with very juddery cantilever brakes

I'm a commuter with a ~13m daily round-trip. I've been riding this on an MTB for 8 years, but I'm looking to upgrade. I recently tried out a 2012 model Specialized Tricross; this having been ...
7
votes
8answers
3k views

What's the point of double-sided SPD pedals if SPD pedals with platform are more convenient and lighter?

Briefly I don't get it. Why would anyone want to use SPD pedals—such as PD-M520, PD-M8000 (left of the image), PD-M9000, PD-M9100, ...—when SPD pedals with platforms—such as PD-EH500 (right of the ...
3
votes
3answers
519 views

Fitting Matchmaker X to SRAM Guide T brakes?

I've got a prebuilt MTB that came with an SRAM NX drivetrain and Guide T brakes and I'm looking at upgrading the drivetrain to higher end parts. I'm thinking about taking the upgrade opportunity to ...
6
votes
5answers
2k views

Which part(s) has the greatest slope of price per pound(kg)?

Just pulled the trigger on a Specialized Allez (61 frame) road bike, since I am getting back into riding. While the Allez does have a carbon-fiber fork and aluminum frame, I think the wheels could be ...
1
vote
1answer
127 views

Derailleur broken?

I had a crash recently and now I have taken off my rear mech and seen that the guide pulley is spinning as usual but the tension pulley is getting stuck. There is a picture below of the broken pulley. ...
3
votes
1answer
57 views

Rod Brake Eyebolt nut size

I have an old Elswick Hopper, and would like to know the size/thread of the rod brake eye bolt nut?
4
votes
4answers
471 views

Commuting and recreation scooter with handlebar brake lever

I am looking for a commuting / recreation scooter but have no experience of using one. I am very familiar with riding a bike and using handlebar-mounted brake levers. My budget is sub-£100 (GBP) and ...
0
votes
6answers
5k views

What can cause the front wheel to lock up when going over a small bump?

I was going over a bump. When the front wheel hit the bump, it suddenly stopped moving, the rear wheel lifted off the ground, and I was thrown face-first onto the road. I sustained injuries to the ...
3
votes
6answers
883 views

Adjust brakes to avoid deflating tire for removal

Is there a way to adjust the front brakes on my Specialized bicycle so I don't have to deflate the tire to remove it? The bike has a side-pull brake with a lever that provides extra space between the ...
16
votes
8answers
8k views

Can I avoid falling in the rain on a corner?

I was riding in the rain a few months ago and fell turning a 90° corner. Here are the details: Riding on a road bike with new 25mm smooth tires inflated to 100 psi (Cannondale Synapse with ...
3
votes
1answer
191 views

Cantilever brake is missing its mounting screws and washers, how do I replace them?

Context I am fixing up a BSO where the rear cantilever brake is missing. I want to keep this project green and cheap, and there is a good supply of used cantilever brakes online. But they often come ...
-2
votes
0answers
54 views

I can't seem to find what kind of Bike I have [closed]

-Serial # : B600700083 -Brand: Haro -Size: 14 -Colour: Black -Suspension: Full -Type of Suspension: Air -Front Suspension type: Steel Stantion -Brand of Shocks: Rock Shox
0
votes
1answer
112 views

Giant Sedona with elliptical crank

I am trying to determine the model suffix and yr for my giant Sedona. It has an elliptical crank, no seat tube shock, and no front fork shock. It was made in Taiwan, the frame that is, it is an 18-...
4
votes
4answers
744 views

Is it more difficult to mount non-tubeless tires on tubeless-ready rims than non-tubeless-ready rims?

In the summer I bought an e-road-bike that has tubeless-ready rims. I wanted to change the tires to better ones, so I bought a pair of Continental GP 5000 (non-tubeless) 28mm tires, and installed them ...
1
vote
1answer
148 views

Is my bike frame too big if the top bar touches my testicles?

A bike was given to me for a gift and I am a male with testicles and if I stand in front of my seat the bar touches me on my testicles. Do avoid this I have to stand on my tippy-toes. Is the bike too ...
1
vote
0answers
60 views

Brake hood mirror for Specialized bicycle

Are there any brake hood mirrors available that will fit the Tiagra shifters on my Specialized bicycle? I can't tell exactly what model they are; but, they say "Tiagra Double" on the front. ...
1
vote
5answers
945 views

Use Brompton BWR 3-speed hub to create a full 700c wheel?

I have been looking at getting an internal gear hub wheel for my commuter. I currently ride a fixie and I find myself wanting a lower gear at stop lights and a higher gear in straight aways. Basically ...
57
votes
30answers
13k views

How can I make my bike (and myself) visible at night?

By winter I will be commuting on my bike at night. How can I make my bike as visible as possible to all car drivers?
7
votes
3answers
2k views

Does carbon fiber not have a fatigue life?

I’ve heard carbon fiber “has no fatigue life”, meaning it doesn’t weaken from (intended) use, as long as it is free of defects and damage. But there are a lot of different types of carbon fiber… I was ...
12
votes
1answer
1k views

What do I do when I am unsure if a carbon fiber component is safe to use or needs replacing or repairing?

Intended as a canonical answer to the many questions we have about damage to carbon parts. It is well known that carbon fiber parts can be damaged and fail, and carbon parts can be fragile when ...
3
votes
3answers
595 views

Wax or ceramic coat disk brake caliper?

I am currently in the process of building a new road bike and I want to preserve the nice look of my new hydraulic Shimano Ultegra brake calipers. Normally I'd just coat the the area I want to ...
3
votes
1answer
70 views

At what temperature can you use a "vulcanizing" tube repair kit?

I have a repair kit "REMA TT 02 Tour Patch Kit". It says its glue/cement is "vulcanizing" but I don't know where to find a manual. At what temperature can the glue work? Ex: if ...
3
votes
3answers
131 views

What could be the reason for flatting a tubeless tire

I am running a tubeless setup since September and the switching process has not been easy(lots of small problems) but Yesterday I had the most bizarre occurence of all while riding with a friend. Out ...
1
vote
1answer
106 views

Air Compressors never have air pressure gauges here so what is the easiest way to achieve a certain tire pressure?

I just checked a high end bicycle shop and it doesn't have air pressure gauge on the air compressor outlet( or anywhere) and the local shop doesn't have one at the end of long outside one- it is ...
5
votes
2answers
1k views

Would a heavy fork cause problem when climbing?

I have a MTB which has a 1.600g frame and 2.600g suspension fork. Does being heavy at the front cause a disadvantage when climbing?
4
votes
2answers
3k views

Importance of "H.E." rim designation on MTB to tire fitment?

I'd like to convert an MTB with 26X1.95 knobbies to road use for the wife but wonder if the present tire designation, specifying H.E. rims means anything once proper size tires are found. Many thanks!
2
votes
4answers
1k views

SRAM Eagle XX1 Cassette creaking under torque, only after warming up

This happens after riding the bike for about an hour. I've replaced free hub, greased/torqued the cassette interface several times, etc. These videos show what I'm up against. Update: after more ...
3
votes
2answers
11k views

How much does it cost to race in the Tour de France?

Assuming one makes it onto a pro team that's been selected, I was wondering how much it costs per rider to race in the Tour? I'm interested in the set cost for each rider to race, if there is one, ...
3
votes
2answers
1k views

Canyon Grail headset play

I got new Grail CF SL 8 and my headache started when I realized I cannot make headset play stop. After tightening all the screws to exact values I can still produce play on my steering wheel. ...
3
votes
2answers
67 views

Removing Nexus 8-speed IGH from hub shell

I'm trying to remove my Nexus SG-C6001-8D from its hub shell to grease it. Sadly Shimano's documentation doesn't cover the process of extracting the internals from the hub shell. The info I can find ...
7
votes
2answers
371 views

Is there any relation between tyre pressures and quality of the tyre?

I'm looking to renew one of the tyre on my MTB as it's on a dying stage. I see some tyres those have 40 PSI tyre pressure level and some have 60 PSI. They are both 26x2.00 so it can't be about width. ...
3
votes
1answer
105 views

Should I replace this tube or try to replace the core?

I just borrowed this old bike and realized could not pump up the back wheel. When I saw the valve, it looks like the valve core is missing. I tried to install a new presta core but it did not fit. ...
-2
votes
3answers
147 views
7
votes
4answers
2k views

What exactly do seats with a cut out in the middle achieve?

I've read that seats with a cut out are a good way of relieving stress on your sensitive areas. So we have seats like this: My question is: from what I've read, the problem with cycling with bad ...
3
votes
2answers
355 views

What do we know about the heritage of Campagnolo's groupset names?

Campagnolo, nicknamed Campy in the US or Campag in the UK, has long been associated with road cycling. Cyclists frequently attribute the invention of the quick release to Tullio Campagnolo, the ...
3
votes
3answers
436 views

Does there exist a gravel bike that can accommodate 29″×2.25″ ribbed (and studded) tyres?

The title line says it all. Just by looking at the pictures of the forks used for gravel bikes, and before reading the specs, it's evident that a 2.25″ won't fit. Is the term "gravel" today ...
3
votes
4answers
309 views

What is the smallest collection of bikes to maintain for these three types of snowed over paths?

Selecting the kind of bike to ride depends perhaps a bit too much on context—how much snow, whether and how quickly the snow is plowed, etc. Last winter I've taken the road bike on trails (and ...
5
votes
3answers
212 views

What model of rear brake caliper do I need?

This old beater bike is missing one part. The front rotor and caliper are there. But the rear caliper is missing. What model of rear caliper do I need? If you are able to identify the model (...
15
votes
2answers
4k views

Can a normal bicycle be adapted as a draisine (to use on abandoned railways with the tracks in place)?

For a long time I've wanted to rent a draisine and ride it down an old abandoned railway. There's dozens of places in Scandinavia where one can do so. Source: Jonas Andréasson, Wikimedia Commons ...
7
votes
2answers
2k views

Chain rubs against frame when in smallest rear cog

I've set up a 12-speed SRAM Force groupset with an XDR cassette. When in the smallest rear cog, the chain rubs against the frame: Does anyone know what causes this and how to fix it? The frame is a ...
0
votes
3answers
65 views

Mechanical disc brake caliper round pads 23 mm diameter

I’m trying to find round brake pads of ca. 23mm diameter. They are for a Valk bike brand sold online in Australia. There is no brand or model evident on the brake caliper or levers. Almost certainly ...

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